Verified answer

240:(y:15)-18=42

240:(у:15)=42+18

240:(у:15)=60

у:15=240:60

у:15=4

у=4*15

у=60

Ответ:60

Verified answer

240:(y:15)-18=42

240*15:y=42+18

3600:у=60

60у=3600

у=3600:60

у=60